<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>全局属性</title>
    <style>
        .drag{
            width: 100px;
            height: 100px;
            background-color: rgb(192, 87, 87);
        }
    </style>
</head>
<body>
    <div id="abc">abc</div>
   <div class="abc"></div>
   <div class="abc"></div>
   <div data-ab="123"></div>
   <h2 title="这是h2" contenteditable>title</h2>
   <div class="drag" draggable="false"></div>
   <a href="javascript:alert('ok')" >a</a>
</body>
</html>